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- // Copyright 2019 The Chromium Authors. All rights reserved.
- // Use of this source code is governed by a BSD-style license that can be
- // found in the LICENSE file.
- #ifndef CC_LAYERS_MIRROR_LAYER_H_
- #define CC_LAYERS_MIRROR_LAYER_H_
- #include <memory>
- #include "base/memory/scoped_refptr.h"
- #include "cc/cc_export.h"
- #include "cc/layers/layer.h"
- namespace cc {
- // A layer that can mirror contents of another Layer.
- class CC_EXPORT MirrorLayer : public Layer {
- public:
- static scoped_refptr<MirrorLayer> Create(scoped_refptr<Layer> mirrored_layer);
- MirrorLayer(const MirrorLayer&) = delete;
- MirrorLayer& operator=(const MirrorLayer&) = delete;
- Layer* mirrored_layer() const { return mirrored_layer_.get(); }
- // Layer overrides.
- std::unique_ptr<LayerImpl> CreateLayerImpl(
- LayerTreeImpl* tree_impl) const override;
- void PushPropertiesTo(LayerImpl* layer,
- const CommitState& commit_state,
- const ThreadUnsafeCommitState& unsafe_state) override;
- void SetLayerTreeHost(LayerTreeHost* host) override;
- protected:
- explicit MirrorLayer(scoped_refptr<Layer> mirrored_layer);
- private:
- ~MirrorLayer() override;
- // A reference to a layer that is mirrored by this layer. |mirrored_layer_|
- // cannot be an ancestor of |this|.
- const scoped_refptr<Layer> mirrored_layer_;
- };
- } // namespace cc
- #endif // CC_LAYERS_MIRROR_LAYER_H_
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